U.S. President George. W. Bush arrived in Prague, Czech Republic, in the late evening hours on Monday for a working visit.

All flights scheduled for the evening on Monday were delayed due to Bush's arrival. Prague Castle and adjoining streets have been closed. Transportation in the city center was suspended.

The same day, some 2,000 people protested against the possible stationing of a U.S. radar base on Czech territory in the center of Prague on the occasion of Bush's visit.

The demonstration was organized by the No To Bases group. Another group of people who protested against the radar base outside the U.S. Embassy earlier this afternoon joined the demonstration later. The protest outside the U.S. Embassy was organized by the Communist Youth (KSM) and the Communist Party (KSCM).

Bush, who pays a two-day visit to Prague beginning June 4, will mainly discuss the planned stationing of the U.S. radar base on Czech territory with the Czech leaders.

The United States made a formal request in January to place a radar base in the Brdy military area southwest of Prague and 10 interceptor missiles in neighboring Poland as part of a planned global missile defense shield.

The first and the second round of Czech-U.S. talks on the radar base was completed in May. The talks are to last several months. Washington expects the Czechs to give a clear final answer on the base after Jan. 1, 2008.

During his stay, Bush will also talk about the possibility of including the Czech Republic in the U.S. visa waiver regime.